完形填空（共20小题；每小题2分，共40分）
There was a woman in Detroit, who has two sons．She was worried  36  them, especially the younger one, Ben, 37  he was not doing well in school． Boys in his class 38  fun of him because he seemed so   39 ．
The mother  40  that she herself, would have to get her sons to do better in school．She  41   them to go to the Detroit Public Library to read a  42  a week and do a report about it for her．
One day, in Ben’s  43 , the teacher held up a rock and asked if anyone knew it. Ben  44  up his hand and the teacher let him  45  ．“Why did Ben raise his hand?” they wondered． He   46  said anything; what could he possibly want to say?
Well, Ben not only   47  the rock; he said a lot about it． He named other rocks in its group and even knew  48  the teacher had found it． The teacher and the students were  49 ． Ben had learned all this from doing one of his book   50  ．
Ben later went on to the   51  of his class．When he finished high school, he went to Yale University   52  at last became one of the best doctors in the United States．
After Ben had grown up, he   53  something about his mother that he did not know as a   54  ．She, herself, had never learned how to   55   ．

A．about B．on C．with D．over

A．because B．so C．but D．though

A．played B．got C．took D．made

A．clever C．slow D．quick

A．asked B．decided C．forgot D．heard

A．made B．let C．told D．considered

A．notice B．message C．book D．question

A．class B．room C．office D．lab

A．looked B．gave C．took D．put

A．think B．leave C．stand D．speak

A．always B．even C．quickly D．never

A．found B．played C．knew D．threw

A．whether B．when C．where D．why

A．afraid B．surprised C．worried D．unhappy

A．pictures B．exercises C．shops D．reports

A．top B．end C．back D．side

A．so B．and C．or D．however

A．learnt B．remembered C．understood D．guessed

A．doctor B．child C．student D．teacher

A．read B．work C．teach D．show